- Type
- Raman scattering
- Assignments summary
- Characteristics summary
| Assignment | Symmetry | Mode | Specie(s) | Molecule/Atom | Bond | Multiplicity | Degeneracy | Contribution | Resonance |
|---|---|---|---|---|---|---|---|---|---|
| Fe2+-O⁻ excitation | ligand-to-metal charge-transfer |
Fe2+ O⁻ |
no |
| Peak position (cm-1) |
Center position (cm-1) |
Width (cm-1) |
Shape | Asymmetry factor | Peak intensity (cm-1) |
Peak intensity relative | Peak strength | Integrated intensity (cm-2) |
Integrated intensity relative | Integrated strength | Temperature (K) |
Pressure (bar) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 513.5 ± 6 | - | 70 ± 5.4 | symmetric | 0.009 | vw | 0.062 | m | 295.0 | 1 |
- Label
- Fe2+-O⁻ excitation
- Category
- electronic transition
Evaluation
- Level
- uncertain assignment
- Evaluation
- uncertain
- Comments
- also attributed to Fe2+ excitation by Farsang et al. (2018), with ref. to Popkow et al. (1972)
| # | Multiplicity type | Degeneracy | Other band |
|---|---|---|---|
| 1 | no |
- Label (type)
- Fe2+-O⁻ (ligand-to-metal charge-transfer)
Electronic modes
- Composition
- 0.05
- Texture
- crystal in plot
- Temperature
- 295.0 ± 5.0 K
Temperature
- Pressure
- 1 bar
Pressure
- Laser wavelength
- 532.0 nm
- Sample orientation mode
- unoriented
- Method #1
- various
- Overlap
- isolated
- Peak
- 513.5 ± 6 cm-1 (fit peak)
- Evaluation
- validated
- Quality
- D
- Comments
- weak decreases with Mg fraction
- FWHM
- 70 ± 5.4 cm-1 (fwhm)
- Shape
- symmetric
- Evaluation
- validated
- Quality
- E
- Comments
- independent of Mg fraction up to 25% Mg and then slight decrese
- Method
- baseline corrected peak intensity
- Relative intensity
- 0.009 ± 0.005
- Strength
- very weak (vw)
- Evaluation
- validated
- Quality
- E
- Comments
- dispersed - no trend
- Method
- width x peak intensity
- Relative intensity
- 0.062 ± 0.031
- Strength
- medium (m)
- Evaluation
- recommended
- Quality
- E
- Comments
- dispersed - no trend
- Publication
- SSHADE spectra
-
- Schmitt, Bernard; Montagnac, Gilles (2025): MIR-FIR normalized Raman spectrum (532 nm) of Mg-Mn-Siderite (St-Georges d'Hurtières) - grain M2-F1 - Mg# = 7.65%. Version 1. SSHADE/DRIMS (OSUG Data Center). Dataset/Spectral Data.
- Schmitt, Bernard; Montagnac, Gilles (2025): MIR-FIR normalized Raman spectrum (532 nm) of Mg-Siderite (Terril du Villaret, France) - grain M4-H0 - Mg# = 24.7%. Version 1. SSHADE/DRIMS (OSUG Data Center). Dataset/Spectral Data.
- Schmitt, Bernard; Montagnac, Gilles (2025): MIR-FIR normalized Raman spectrum (532 nm) of Mg-Siderite (Mines de La Mure, France) - grain M3-E8a - Mg# = 39.2%. Version 1. SSHADE/DRIMS (OSUG Data Center). Dataset/Spectral Data.